Rice Husk Charcoal Greatly Improves the Yield of Steel

Rice is the grain with the second-highest worldwide production after maize (corn). Rice is the seed of plant Oryza sativa (Asian rice) or Oryza glaberrima (African rice). As a cereal grain, it is the most widely consumed staple food for a large part of the world's human population, especially in Asia.

Rice seed is food and rice straw is a good feed and material for papermaking and weaving. Rice sprout and rice root can be used in medicinal.  Except as feed, rice husk can be carbonized in charcoal equipment- carbonization furnace. Rice husk charcoal carbonized is used a lot in steel mills, the current market price of 2800 RMB / ton.

The carbonization of rice husk can be 3 steps: low temperature damp exhaust--high temperature calcination--cooling. Before carbonization, the rice husk has water content about 8%, which would be a big problem of carbonization/charring since the moisture will seriously affect the charring quality. So the moisture removal time must be guaranteed, which needs 10-15 hours for kiln and 2-3.5 hours for mechanisms kiln. Long heating time can avoid rice husk cracking caused by moisture, and guarantee charring quality.

When the furnace temperature reaches 300℃, there are large amounts of combustible gases generated in the furnace. Generally speaking, 3m3 methane gas can be generated from 0.5kg rod materials, which helps to heat the furnace. Or use the gases as drying heat for dryers. The temparature for calcination is above 400℃ and the furnace must be sealed with anaerobic closing fire. The cooling can be spontaneous cooling or water cooling.
After carbonization, first keep ventilation of the charcoal kiln (carbonization furnace) to prevent carbon dioxide poisoning. The rick husk carbonized should be placed outdoors more than 8 hours to complete cooling.

Rice husk carbonized is used a lot in steel mills. Rice husk charcoal is light with low thermal conductivity. Its shell-like structure, there is still air in the voids formed barrier, it has extremely excellent thermal insulation, thermal insulation properties. It plays a very good thermal insulation on chain casting, ladle, even water cans and other metal covering intermediate, reduces shrinkage of steel, and greatly improves the yield of finished steel.

Carbonization furnace manufacturer – Gongyi Tongli Machinery Factory design carbonization furnace and airflow carbonization furnace by their own innovative ideas, innovate charcoal machine, improve design process, greatly improved the production capacity, thus provide cost-effective carbonization furnace for customers.

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